As part of the development of an automated close-range photogrammetric measurement system, a small but valuable refinement has been made to the algorithm which is used to automati... [more]

As part of the development of an automated close-range photogrammetric measurement system, a small but valuable refinement has been made to the algorithm which is used to automatically "place the floating mark on the ground". The change requires a more extensive computer program, but it enhances precision, and speed in certain cases.

The effect of radial lens distortion on close-range stereophotogrammetry is discussed. An overview is presented with a mathematical derivation, followed by a detailed analysis sho... [more]

The effect of radial lens distortion on close-range stereophotogrammetry is discussed. An overview is presented with a mathematical derivation, followed by a detailed analysis showing the amounts of x-parallax across a stereomodel which are introduced by the distortion and which remain uncompensated during a relative orientation. The discussion concentrates on the use of small non-metric cameras and the results are analysed to indicate the magnitude of errors which can be introduced to stereoscopic photogrammetry from this source. -Authors

Citations

Scopus - 11

1986

Mitchell HL, 'Can the consulting surveyor make use of photogrammetry?', Australian Surveyor, 33 199-213 (1986)

Although world-wide research into close-range photogrammetry is quite extensive, there is little evidence of the commercial use of photogrammetry in Australia, other than for topo... [more]

Mitchell HL, 'A computer program for least squares adjustment using combined observation and condition equations.', University of Edinburgh, Department of Geography, Research Discussion Paper, 18 (1981)

A FORTRAN program which obtains a least-squares solution for combined observation and condition equations for the purposes of adjusting observations. It calculates the unknown par... [more]

A FORTRAN program which obtains a least-squares solution for combined observation and condition equations for the purposes of adjusting observations. It calculates the unknown parameters, their variances and covariances from data representing the equations which model any adjustment problem. It may be used either in the adjustment of observations or in studies directed at optimizing observations schemes. The combined equation method is utilized in a second program which can be used in conjunction with the first to determine co-ordinate transformation parameters. The application of the adjustment program to traverse adjustment is also explained. -from Author